I injured my foot 3 weeks abo playing soccer was in an aircast and crutched ...... its still swollen , tingling, pressure when i walk, burning?

Have it checked: Have site re evaluated for compartment syndrome, soft tissue injury, occult fracture perhaps an MRI would be valuable in further assessment.

Go see your doctor..: Again! sure, it may take a while for an injury to heal (depending upon its severity), but you need a game plan so that you'll know what steps to take if you're not improving by some given date. You didn't mention any xrays so that would be my next move. And perhaps consider physical therapy, too.